Lamp.



W. s. HAMM.

y LAMP.` A-PPLIUATION FILED MAR. 25, 1010.

1,018,187. v n Patented Feb. 20, 1912.

' UNITED sTATEs PATENT oEEIcE.

' WILLIAM s. HAMM, or HUBBARD woons, Immers,- AssIGNon To THE ADAMS a WEST- LAKE ceMrANY, A conroaATroN or ILLINoIs.

LAMP.

Specification o! Letters Patent.

Application filed March 25, 1910. Serial No. 551,449.

an oil burner or` an electric lamp as the illuminating agent, and to provide a lamp with an .extensioncarrying an identifying number, this extension being in boxform, its chamber being so connected with the lamp chamber that it is illuminated therefrom, the characters composing the number being transparent or translucent.

The invention consists in a structure such as is hereinafter described, and as illustrated in the accompanying drawings, in which- Figure 1 is an elevation of the combined lamp and number plate; Fig. 2 is a plansection on the line 2-2 of Fig. 1; and Fig.` 3 isa detail, artly in section, taken on the line 4--4 of Fig. 2.

The body of the lamp 10may be of any desired design, and is shown as cylindrical in form and provided with a vertically sliding door 11, a dome 12, and a light-emitting lens 13'."

An oil vfont 14 is located within the lamp body, and is mounted upon a spindle 15, projecting through the bottom thereof and provided with a crank-arm 16, by means of which it may be oscillated. The font is located' in the back part of the lamp body, regarding the lens 13 as the front thereof. A burner 17 is mounted upon the font adjacent one side thereof, and is provided with a wick-raising spindle 18, which projects to the exterior of the bodythrough an aperture 19 or an aperture 20, one opening laterally from either side of the door opening. An incandescent electric lamp 21 is mounted `upon the font and adjacent the side opporent supply.

Either of the illuminating devices becomes serviceable whenubrnu'ght to the focal lpoint of the lens 13, 'and they may be rought to this point in alternation by reason of the fact that the font upon which they are supported has its axis eccentric to this point; and the illuminating devices are so mounted upon the support that the distance between each and this axis is the same as the distance between the axis and the focal point of the lens. As shown, and preferably, the focal point of the lens is upon the longitudinal or vertical axis of the body of the lamp.

B y turning the font by means of the crank-arm 16 through 180 degrees, either the burner or incandescent vlamp is brought to the focus of thelens 13. The burner 17 is free to turn in the font socket within which itis fitted, to permit this range 4of movement, although the door opening 'of the lamp body is of less width and the portions of the lines 22, 23, within the lamp body are sufficiently slack to accommodate themselves to thisy movement. Should either source of illumination fail for anyre'ason, the other may be immediately availed of.

The lamp may be Asupported by means of .a bracket 24, provided with an attaching plate 25, and in practice be so mounted at 'the rear of the vehicle that the lens13 is directed backwardly.-

I claim as my invention:v

-1. In a lamp, in combination, an upright body having a light-emit-ting aperture, an oscillatable font within the body .and having its axis eccentric to the axis of the body, an oil burner, and an electric lamp mounted upon the font and at opposite sides of its center and being spaced apart therefrom a distance equal to the distance between the axes of the body and of the font.

2. In a lamp for vehicles, in combination, a chambered body having lightfemitting apertures, an oil font within the body and having an oil burner andan electric lamp mounted thereon, and means external of the chambered body for oscillating the font to bring such sources of illumination in alternation into effective relation with reference to such apertures.

3. In a lamp, in combination, a chambered body having a light-emitting lens, an. oscillatable oil font within the body, an oil burner, an electric lamp mounted upon the font and adjacent opposite sides thereof, a

stem lprojecting from the fontthrough the bottom of the body, and a crank arm fixed to the outer end of tbe stem.

4. In a lamp, in combination, a body llaving a lens, an oscillatable support Within 5 the body and having its axis eccentric to the focal point of the lens, a plurality of light developing devices mounted on the support in aplane passing through the focal point of the lens and each being spaced apart from the center of the support a distance equal to 10 the distance of such center from the lfocal point of the lens.

WILLIAM S'. HAMM. Witnesses LOUIS K. GILLsoN, E. M. KLATCHER. 

